CN111704761A - Crosslinked polyethylene insulated cable material and preparation method thereof - Google Patents
Crosslinked polyethylene insulated cable material and preparation method thereof Download PDFInfo
- Publication number
- CN111704761A CN111704761A CN202010616928.8A CN202010616928A CN111704761A CN 111704761 A CN111704761 A CN 111704761A CN 202010616928 A CN202010616928 A CN 202010616928A CN 111704761 A CN111704761 A CN 111704761A
- Authority
- CN
- China
- Prior art keywords
- polyethylene
- modified
- stirring
- cable material
- insulated cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 57
- 229920003020 cross-linked polyethylene Polymers 0.000 title claims abstract description 51
- 239000004703 cross-linked polyethylene Substances 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- -1 polyethylene Polymers 0.000 claims abstract description 213
- 239000004698 Polyethylene Substances 0.000 claims abstract description 178
- 229920000573 polyethylene Polymers 0.000 claims abstract description 178
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 78
- 238000004132 cross linking Methods 0.000 claims abstract description 47
- 239000004005 microsphere Substances 0.000 claims abstract description 36
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 35
- 239000010703 silicon Substances 0.000 claims abstract description 35
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 26
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 26
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 22
- 239000003381 stabilizer Substances 0.000 claims abstract description 22
- 239000000314 lubricant Substances 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims description 60
- 239000000243 solution Substances 0.000 claims description 48
- 239000002243 precursor Substances 0.000 claims description 42
- 229910021634 Rhenium(III) chloride Inorganic materials 0.000 claims description 40
- LOIHSHVELSAXQN-UHFFFAOYSA-K trirhenium nonachloride Chemical compound Cl[Re](Cl)Cl LOIHSHVELSAXQN-UHFFFAOYSA-K 0.000 claims description 40
- 239000008367 deionised water Substances 0.000 claims description 35
- 229910021641 deionized water Inorganic materials 0.000 claims description 35
- 235000010987 pectin Nutrition 0.000 claims description 32
- 239000001814 pectin Substances 0.000 claims description 32
- 229920001277 pectin Polymers 0.000 claims description 32
- 239000003795 chemical substances by application Substances 0.000 claims description 31
- 239000000126 substance Substances 0.000 claims description 31
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 30
- 238000005303 weighing Methods 0.000 claims description 30
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims description 29
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims description 29
- 229940068041 phytic acid Drugs 0.000 claims description 29
- 235000002949 phytic acid Nutrition 0.000 claims description 29
- 239000000467 phytic acid Substances 0.000 claims description 29
- 238000006243 chemical reaction Methods 0.000 claims description 26
- XVPBINOPNYFXID-JARXUMMXSA-N 85u4c366qs Chemical compound C([C@@H]1CCC[N@+]2(CCC[C@H]3[C@@H]21)[O-])N1[C@@H]3CCCC1=O XVPBINOPNYFXID-JARXUMMXSA-N 0.000 claims description 23
- 229930015582 oxymatrine Natural products 0.000 claims description 23
- 239000011259 mixed solution Substances 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 20
- 238000005406 washing Methods 0.000 claims description 20
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 17
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 17
- 229910000077 silane Inorganic materials 0.000 claims description 17
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 15
- ARGICNMLPHJXTP-UHFFFAOYSA-N [SiH4].C(=C)C(OC(CCC)=NO)C(COC(CCC)=O)OC(CCC)=O Chemical compound [SiH4].C(=C)C(OC(CCC)=NO)C(COC(CCC)=O)OC(CCC)=O ARGICNMLPHJXTP-UHFFFAOYSA-N 0.000 claims description 14
- TXSUIVPRHHQNTM-UHFFFAOYSA-N n'-(3-methylanilino)-n-phenyliminobenzenecarboximidamide Chemical compound CC1=CC=CC(NN=C(N=NC=2C=CC=CC=2)C=2C=CC=CC=2)=C1 TXSUIVPRHHQNTM-UHFFFAOYSA-N 0.000 claims description 14
- 235000012424 soybean oil Nutrition 0.000 claims description 14
- 239000003549 soybean oil Substances 0.000 claims description 14
- 229920001973 fluoroelastomer Polymers 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 10
- 229920000053 polysorbate 80 Polymers 0.000 claims description 10
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- UFTFJSFQGQCHQW-UHFFFAOYSA-N triformin Chemical compound O=COCC(OC=O)COC=O UFTFJSFQGQCHQW-UHFFFAOYSA-N 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 6
- QNRMTGGDHLBXQZ-UHFFFAOYSA-N buta-1,2-diene Chemical compound CC=C=C QNRMTGGDHLBXQZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000011575 calcium Substances 0.000 claims description 6
- 229910052791 calcium Inorganic materials 0.000 claims description 6
- 239000006084 composite stabilizer Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000000748 compression moulding Methods 0.000 claims description 6
- XLJMAIOERFSOGZ-UHFFFAOYSA-M cyanate Chemical compound [O-]C#N XLJMAIOERFSOGZ-UHFFFAOYSA-M 0.000 claims description 6
- YAHBZWSDRFSFOO-UHFFFAOYSA-L dimethyltin(2+);2-(2-ethylhexoxy)-2-oxoethanethiolate Chemical compound CCCCC(CC)COC(=O)CS[Sn](C)(C)SCC(=O)OCC(CC)CCCC YAHBZWSDRFSFOO-UHFFFAOYSA-L 0.000 claims description 6
- PWWSSIYVTQUJQQ-UHFFFAOYSA-N distearyl thiodipropionate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCCCCCC PWWSSIYVTQUJQQ-UHFFFAOYSA-N 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 239000012948 isocyanate Substances 0.000 claims description 6
- 150000002513 isocyanates Chemical class 0.000 claims description 6
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- ZSBXGIUJOOQZMP-UHFFFAOYSA-N Isomatrine Natural products C1CCC2CN3C(=O)CCCC3C3C2N1CCC3 ZSBXGIUJOOQZMP-UHFFFAOYSA-N 0.000 claims description 5
- 241000219784 Sophora Species 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000010000 carbonizing Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 5
- 229930014456 matrine Natural products 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000035699 permeability Effects 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000003763 carbonization Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 229910052814 silicon oxide Inorganic materials 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 235000019198 oils Nutrition 0.000 description 4
- 229910052702 rhenium Inorganic materials 0.000 description 4
- 239000012752 auxiliary agent Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002738 chelating agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 125000004437 phosphorous atom Chemical group 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 150000003281 rhenium Chemical class 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/18—Spheres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention relates to the field of cable materials, in particular to a crosslinked polyethylene insulated cable material and a preparation method thereof, wherein the crosslinked polyethylene insulated cable material comprises the following components in parts by weight: 80-100 parts of modified polyethylene, 5-10 parts of nano modified organic silicon microspheres, 0.5-2 parts of cross-linking agent, 0.05-1 part of cross-linking assistant, 0.1-1 part of stabilizer, 0.2-0.5 part of antioxidant and 0.5-1 part of lubricant. The invention solves the problems of high water permeability and poor crosslinking effect of the existing crosslinked polyethylene insulated cable material. The crosslinked polyethylene cable material obtained by the invention has excellent mechanical properties, high temperature resistance, low water resistance and excellent crosslinking property, and effectively expands the application range of the crosslinked polyethylene cable material.
Description
Technical Field
The invention relates to the field of cable materials, in particular to a crosslinked polyethylene insulated cable material and a preparation method thereof.
Background
The insulated cable material has the characteristics of simple structure, easy realization of process, low cost and the like, and is widely applied. The traditional cable generally adopts PVC plastic as an insulating layer material, but the PVC material contains a large amount of halogen, releases harmful gas during combustion, and causes great damage to the surrounding environment. Polyethylene has the characteristics of good insulativity, processability, low temperature resistance, aging resistance and the like, and is an excellent electrical insulating material. Therefore, the cable material using crosslinked polyethylene as the insulating material is more and more popular. However, the existing crosslinked polyethylene insulated cable material still has the problems of high water permeability and poor crosslinking effect.
Disclosure of Invention
In view of the above problems, a first object of the present invention is to provide a crosslinked polyethylene insulated cable material, which comprises the following components in parts by weight:
80-100 parts of modified polyethylene, 5-10 parts of nano modified organic silicon microspheres, 0.5-2 parts of cross-linking agent, 0.05-1 part of cross-linking assistant, 0.1-1 part of stabilizer, 0.2-0.5 part of antioxidant and 0.5-1 part of lubricant.
Preferably, the crosslinked polyethylene insulated cable material comprises the following components in parts by weight:
90 parts of modified polyethylene, 8 parts of nano modified organic silicon microspheres, 1 part of cross-linking agent, 0.5 part of cross-linking auxiliary agent, 0.5 part of stabilizing agent, 0.3 part of antioxidant and 0.8 part of lubricant.
Preferably, the modified polyethylene is obtained by modifying polyethylene with a modifying treatment agent.
Preferably, the preparation method of the modified treating agent comprises the following steps:
s1, weighing rhenium trichloride, adding the rhenium trichloride into deionized water, and stirring until the rhenium trichloride is completely dissolved to obtain a rhenium trichloride solution; weighing pectin, adding the pectin into deionized water, stirring until the pectin is completely dissolved, adding phytic acid, and stirring again until the phytic acid is dissolved to obtain a precursor mixed solution;
wherein in the rhenium trichloride solution, the mass ratio of rhenium trichloride to deionized water is 1: 5-10; in the precursor mixed solution, the mass ratio of pectin to phytic acid to deionized water is 1: 2-3: 10-15;
s2, heating the precursor mixed solution to 70-80 ℃, dropwise adding the rhenium trichloride solution while stirring, continuing to react for 2-4 h after dropwise adding is finished, then pouring into a reaction kettle, heating to 200-240 ℃, sealing to react for 4-6 h, naturally cooling to room temperature, filtering to obtain a solid, washing with hot water at 60-80 ℃ for three times, then washing with dichloromethane for three times, and drying under reduced pressure to obtain a modified substance precursor;
the volume ratio of the rhenium trichloride solution to the precursor mixed solution is 1: 2-5;
s3, placing the modified precursor in a graphite furnace, taking inert gas as protective gas, heating to 500-550 ℃, carbonizing, naturally cooling to room temperature, and crushing to obtain the modified treating agent.
Preferably, the preparation method of the modified polyethylene comprises the following steps:
s1, weighing polyethylene, calcium ricinoleate, epoxidized soybean oil and vinyl tributyrinoxime silane, adding the weighed materials into an open mill, heating to 180-220 ℃, and stirring for reaction for 0.5-1 h to obtain a polyethylene pretreatment substance;
wherein the mass ratio of the polyethylene to the calcium ricinoleate to the epoxidized soybean oil to the vinyl tributyrinoxime silane is 100: 2-3: 3-5: 0.5-2;
s2, adding the modifying treatment agent into the polyethylene pretreatment, and stirring and reacting at 150-180 ℃ for 1-2 h to obtain a polyethylene modified treatment substance;
wherein the mass ratio of the modifying treatment agent to the polyethylene pretreatment is 1: 20-50;
s3, weighing polyethylene again, adding the polyethylene into the polyethylene modified treatment substance, heating to 180-220 ℃, stirring for reaction for 0.5-1 h, and adding the mixture into an extruder for extrusion granulation to obtain modified polyethylene;
wherein the mass ratio of the polyethylene to the polyethylene modified treatment substance is 1: 3-8.
Preferably, the preparation method of the nano modified organic silicon microsphere comprises the following steps:
s1, weighing tetraethoxysilane, adding the tetraethoxysilane into n-butyl alcohol, stirring uniformly, then sequentially adding triglyceride, tween-80 and sodium dodecyl benzene sulfonate, stirring uniformly again, placing in a water bath at 60-80 ℃, and continuously stirring for 0.2-0.5 h to obtain a silane solution;
wherein the mass ratio of tetraethoxysilane, triglyceride, tween-80, sodium dodecyl benzene sulfonate and n-butyl alcohol is 1: 0.1-0.2: 0.05-0.2: 0.1-0.3: 5-10;
s2, weighing oxymatrine, adding the oxymatrine into deionized water, heating the water bath to 60-80 ℃, and stirring for 0.5-1 h to obtain a oxymatrine solution;
wherein the mass ratio of the hydroxyl matrine to the deionized water is 1: 5-10;
s3, under the condition that the temperature of a water bath is 60-80 ℃, dropwise adding the hydroxylightyellow sophora root aqueous solution into the silane solution, stirring while dropwise adding, pouring the mixture into a reaction kettle after dropwise adding, setting the temperature to be 160-180 ℃, reacting for 8-12 hours, cooling to room temperature, filtering to obtain a solid, washing with deionized water for three times, then washing with ethanol for three times, drying under reduced pressure, and crushing to obtain nano modified organic silicon microspheres;
wherein the volume ratio of the hydroxymatrine solution to the silane solution is 1: 2-3.
Preferably, the crosslinking agent is at least one of an alkyl peroxide, an aryl peroxide, an acyl peroxide, and a ketone peroxide.
Preferably, the crosslinking assistant is at least one of poly-1, 2-butadiene, triallyl cyanate and triallyl isocyanate.
Preferably, the stabilizer is composed of methyl tin mercaptide and a calcium/zinc composite stabilizer according to a mass ratio of 2-5: 1.
Preferably, the antioxidant is at least one of antioxidant 1076, antioxidant 2246 and antioxidant DSTP.
Preferably, the lubricant is a compound of polyethylene wax and a fluoroelastomer, wherein the mass ratio of the polyethylene wax to the fluoroelastomer is 2-4: 1.
the second purpose of the invention is to provide a preparation method of a crosslinked polyethylene insulated cable material, which comprises the following steps:
(1) adding the modified polyethylene, the crosslinking agent, the crosslinking assistant and the stabilizer into a smelting machine according to the amount, uniformly mixing, and then carrying out melt blending at 120-180 ℃ to obtain a polyethylene crosslinking precursor;
(2) adding the polyethylene crosslinking precursor, the nano modified organic silicon microspheres, the antioxidant and the lubricant into an internal mixer, and mixing at 130-150 ℃ to obtain a polyethylene crosslinking treatment product;
(3) and carrying out compression molding on the polyethylene cross-linked treatment product to obtain the cross-linked polyethylene insulated cable material.
The invention has the beneficial effects that:
1. the invention provides a crosslinked polyethylene insulated cable material and a preparation method thereof, wherein modified polyethylene is obtained by modifying polyethylene, so that the high temperature resistance and the crosslinkability of the polyethylene are improved, the water permeability of the polyethylene is reduced by adding nano modified organic silicon microspheres, and the obtained crosslinked polyethylene cable material has excellent mechanical properties, high temperature resistance, low water resistance and excellent crosslinkability, and the application range of the crosslinked polyethylene cable material is effectively expanded.
2. According to the invention, rhenium salt is used for reacting with pectin and phytic acid, then a complex reaction is carried out, and finally high-temperature carbonization is carried out to obtain the modified treating agent. Pectin and phytic acid can be used as carbon sources for later carbonization, pectin and phytic acid are selected as carbon sources, the pectin and the phytic acid are widely present in plants, the pectin and the phytic acid can be conveniently obtained and have no pollution, the phytic acid can be combined with rhenium ions to form a precipitation complex, the pectin is stable, and gel which is convenient to filter can be generated during reaction; in addition, the phytic acid contains phosphorus atoms, and phosphorus is retained in carbide in the later carbonization process, so that certain flame retardance can be achieved. The finally obtained carbide modifier containing rhenium ions can modify polyethylene, so that the high temperature resistance of the polyethylene is improved, and the crosslinkability of the polyethylene is also improved.
3. And (3) treating the polyethylene with calcium ricinoleate, epoxidized soybean oil and vinyl tributyrinoxime silane to obtain a polyethylene pretreatment substance. Wherein, calcium ricinoleate and epoxidized soybean oil are used as chelating agent and stabilizing agent of polyethylene, which can make the combination of polyethylene and other substances more compact, and vinyl tributyrinoxime silane is used as silane cross-linking agent, which can enhance the cross-linking ability of polyethylene molecular chain. And then the added modifying treatment agent and the polyethylene pretreatment are subjected to crosslinking, melting and mixing, and the polyethylene is modified, so that the high-temperature resistance of the polyethylene can be improved. Polyethylene is added again, because the modified polyethylene has excellent compatibility with polyethylene, the polyethylene can be endowed with excellent tensile property, impact property and bending property; and simultaneously, the crosslinking performance of the polyethylene can be improved.
4. The invention prepares and adds nano modified organic silicon microspheres, aiming at reducing the water permeability of polyethylene. Although the crosslinked polyethylene has excellent low temperature resistance, chemical resistance and electrical insulation, the water vapor permeability of the crosslinked polyethylene is not improved, and when the water content is high, water vapor can permeate the polyethylene to enter the polyethylene to cause the insulation to lose. Therefore, the water permeability of polyethylene is improved by preparing the nano modified organic silicon microspheres. The preparation method of the nano modified organic silicon microspheres comprises the steps of firstly, carrying out hydrolysis reaction on tetraethoxysilane under the action of an organic solvent, a surface agent and a dispersing agent to obtain an oil phase containing silicon oxide, then, dropwise adding a water phase containing oxymatrine into the oil phase to form water-in-oil, wherein the oxymatrine can participate in the reaction of the silicon oxide, and functional groups on the surface of the oxymatrine can be grafted in the silicon oxide to finally obtain the silicon microspheres containing the oxymatrine, namely the nano modified organic silicon microspheres. The nano modified organic silicon microspheres are added into a cross-linked polyethylene material as an additive and can be combined with polyethylene, so that pores formed among crystal bundles or crystal grains in a polyethylene structure are reduced, water molecules are difficult to pass through, and the water permeability of the polyethylene is greatly reduced.
Detailed Description
The invention is further described with reference to the following examples.
Example 1
A crosslinked polyethylene insulated cable material comprises the following components in parts by weight:
90 parts of modified polyethylene, 8 parts of nano modified organic silicon microspheres, 1 part of cross-linking agent, 0.5 part of cross-linking auxiliary agent, 0.5 part of stabilizing agent, 0.3 part of antioxidant and 0.8 part of lubricant.
The modified polyethylene is obtained by modifying polyethylene by using a modifying treatment agent.
The preparation method of the modified treating agent comprises the following steps:
s1, weighing rhenium trichloride, adding the rhenium trichloride into deionized water, and stirring until the rhenium trichloride is completely dissolved to obtain a rhenium trichloride solution; weighing pectin, adding the pectin into deionized water, stirring until the pectin is completely dissolved, adding phytic acid, and stirring again until the phytic acid is dissolved to obtain a precursor mixed solution;
wherein in the rhenium trichloride solution, the mass ratio of rhenium trichloride to deionized water is 1: 5-10; in the precursor mixed solution, the mass ratio of pectin to phytic acid to deionized water is 1: 2-3: 10-15;
s2, heating the precursor mixed solution to 70-80 ℃, dropwise adding the rhenium trichloride solution while stirring, continuing to react for 2-4 h after dropwise adding is finished, then pouring into a reaction kettle, heating to 200-240 ℃, sealing to react for 4-6 h, naturally cooling to room temperature, filtering to obtain a solid, washing with hot water at 60-80 ℃ for three times, then washing with dichloromethane for three times, and drying under reduced pressure to obtain a modified substance precursor;
the volume ratio of the rhenium trichloride solution to the precursor mixed solution is 1: 2-5;
s3, placing the modified precursor in a graphite furnace, taking inert gas as protective gas, heating to 500-550 ℃, carbonizing, naturally cooling to room temperature, and crushing to obtain the modified treating agent.
The preparation method of the modified polyethylene comprises the following steps:
s1, weighing polyethylene, calcium ricinoleate, epoxidized soybean oil and vinyl tributyrinoxime silane, adding the weighed materials into an open mill, heating to 180-220 ℃, and stirring for reaction for 0.5-1 h to obtain a polyethylene pretreatment substance;
wherein the mass ratio of the polyethylene to the calcium ricinoleate to the epoxidized soybean oil to the vinyl tributyrinoxime silane is 100: 2-3: 3-5: 0.5-2;
s2, adding the modifying treatment agent into the polyethylene pretreatment, and stirring and reacting at 150-180 ℃ for 1-2 h to obtain a polyethylene modified treatment substance;
wherein the mass ratio of the modifying treatment agent to the polyethylene pretreatment is 1: 20-50;
s3, weighing polyethylene again, adding the polyethylene into the polyethylene modified treatment substance, heating to 180-220 ℃, stirring for reaction for 0.5-1 h, and adding the mixture into an extruder for extrusion granulation to obtain modified polyethylene;
wherein the mass ratio of the polyethylene to the polyethylene modified treatment substance is 1: 3-8.
The preparation method of the nano modified organic silicon microsphere comprises the following steps:
s1, weighing tetraethoxysilane, adding the tetraethoxysilane into n-butyl alcohol, stirring uniformly, then sequentially adding triglyceride, tween-80 and sodium dodecyl benzene sulfonate, stirring uniformly again, placing in a water bath at 60-80 ℃, and continuously stirring for 0.2-0.5 h to obtain a silane solution;
wherein the mass ratio of tetraethoxysilane, triglyceride, tween-80, sodium dodecyl benzene sulfonate and n-butyl alcohol is 1: 0.1-0.2: 0.05-0.2: 0.1-0.3: 5-10;
s2, weighing oxymatrine, adding the oxymatrine into deionized water, heating the water bath to 60-80 ℃, and stirring for 0.5-1 h to obtain a oxymatrine solution;
wherein the mass ratio of the hydroxyl matrine to the deionized water is 1: 5-10;
s3, under the condition that the temperature of a water bath is 60-80 ℃, dropwise adding the hydroxylightyellow sophora root aqueous solution into the silane solution, stirring while dropwise adding, pouring the mixture into a reaction kettle after dropwise adding, setting the temperature to be 160-180 ℃, reacting for 8-12 hours, cooling to room temperature, filtering to obtain a solid, washing with deionized water for three times, then washing with ethanol for three times, drying under reduced pressure, and crushing to obtain nano modified organic silicon microspheres;
wherein the volume ratio of the hydroxymatrine solution to the silane solution is 1: 2-3.
The crosslinking agent is at least one of alkyl peroxide, aryl peroxide, acyl peroxide and ketone peroxide.
The crosslinking assistant is at least one of poly-1, 2-butadiene, triallyl cyanate and triallyl isocyanate.
The stabilizer is composed of methyl tin mercaptide and a calcium/zinc composite stabilizer according to a mass ratio of 2-5: 1.
The antioxidant is at least one of antioxidant 1076, antioxidant 2246 and antioxidant DSTP.
The lubricant is a compound of polyethylene wax and a fluoroelastomer, wherein the mass ratio of the polyethylene wax to the fluoroelastomer is (2-4): 1.
a preparation method of a crosslinked polyethylene insulated cable material comprises the following steps:
(1) adding the modified polyethylene, the crosslinking agent, the crosslinking assistant and the stabilizer into a smelting machine according to the amount, uniformly mixing, and then carrying out melt blending at 120-180 ℃ to obtain a polyethylene crosslinking precursor;
(2) adding the polyethylene crosslinking precursor, the nano modified organic silicon microspheres, the antioxidant and the lubricant into an internal mixer, and mixing at 130-150 ℃ to obtain a polyethylene crosslinking treatment product;
(3) and carrying out compression molding on the polyethylene cross-linked treatment product to obtain the cross-linked polyethylene insulated cable material.
Example 2
A crosslinked polyethylene insulated cable material comprises the following components in parts by weight:
80 parts of modified polyethylene, 5 parts of nano modified organic silicon microspheres, 0.5 part of cross-linking agent, 0.05 part of cross-linking assistant, 0.1 part of stabilizer, 0.2 part of antioxidant and 0.5 part of lubricant.
The modified polyethylene is obtained by modifying polyethylene by using a modifying treatment agent.
The preparation method of the modified treating agent comprises the following steps:
s1, weighing rhenium trichloride, adding the rhenium trichloride into deionized water, and stirring until the rhenium trichloride is completely dissolved to obtain a rhenium trichloride solution; weighing pectin, adding the pectin into deionized water, stirring until the pectin is completely dissolved, adding phytic acid, and stirring again until the phytic acid is dissolved to obtain a precursor mixed solution;
wherein in the rhenium trichloride solution, the mass ratio of rhenium trichloride to deionized water is 1: 5-10; in the precursor mixed solution, the mass ratio of pectin to phytic acid to deionized water is 1: 2-3: 10-15;
s2, heating the precursor mixed solution to 70-80 ℃, dropwise adding the rhenium trichloride solution while stirring, continuing to react for 2-4 h after dropwise adding is finished, then pouring into a reaction kettle, heating to 200-240 ℃, sealing to react for 4-6 h, naturally cooling to room temperature, filtering to obtain a solid, washing with hot water at 60-80 ℃ for three times, then washing with dichloromethane for three times, and drying under reduced pressure to obtain a modified substance precursor;
the volume ratio of the rhenium trichloride solution to the precursor mixed solution is 1: 2-5;
s3, placing the modified precursor in a graphite furnace, taking inert gas as protective gas, heating to 500-550 ℃, carbonizing, naturally cooling to room temperature, and crushing to obtain the modified treating agent.
The preparation method of the modified polyethylene comprises the following steps:
s1, weighing polyethylene, calcium ricinoleate, epoxidized soybean oil and vinyl tributyrinoxime silane, adding the weighed materials into an open mill, heating to 180-220 ℃, and stirring for reaction for 0.5-1 h to obtain a polyethylene pretreatment substance;
wherein the mass ratio of the polyethylene to the calcium ricinoleate to the epoxidized soybean oil to the vinyl tributyrinoxime silane is 100: 2-3: 3-5: 0.5-2;
s2, adding the modifying treatment agent into the polyethylene pretreatment, and stirring and reacting at 150-180 ℃ for 1-2 h to obtain a polyethylene modified treatment substance;
wherein the mass ratio of the modifying treatment agent to the polyethylene pretreatment is 1: 20-50;
s3, weighing polyethylene again, adding the polyethylene into the polyethylene modified treatment substance, heating to 180-220 ℃, stirring for reaction for 0.5-1 h, and adding the mixture into an extruder for extrusion granulation to obtain modified polyethylene;
wherein the mass ratio of the polyethylene to the polyethylene modified treatment substance is 1: 3-8.
The preparation method of the nano modified organic silicon microsphere comprises the following steps:
s1, weighing tetraethoxysilane, adding the tetraethoxysilane into n-butyl alcohol, stirring uniformly, then sequentially adding triglyceride, tween-80 and sodium dodecyl benzene sulfonate, stirring uniformly again, placing in a water bath at 60-80 ℃, and continuously stirring for 0.2-0.5 h to obtain a silane solution;
wherein the mass ratio of tetraethoxysilane, triglyceride, tween-80, sodium dodecyl benzene sulfonate and n-butyl alcohol is 1: 0.1-0.2: 0.05-0.2: 0.1-0.3: 5-10;
s2, weighing oxymatrine, adding the oxymatrine into deionized water, heating the water bath to 60-80 ℃, and stirring for 0.5-1 h to obtain a oxymatrine solution;
wherein the mass ratio of the hydroxyl matrine to the deionized water is 1: 5-10;
s3, under the condition that the temperature of a water bath is 60-80 ℃, dropwise adding the hydroxylightyellow sophora root aqueous solution into the silane solution, stirring while dropwise adding, pouring the mixture into a reaction kettle after dropwise adding, setting the temperature to be 160-180 ℃, reacting for 8-12 hours, cooling to room temperature, filtering to obtain a solid, washing with deionized water for three times, then washing with ethanol for three times, drying under reduced pressure, and crushing to obtain nano modified organic silicon microspheres;
wherein the volume ratio of the hydroxymatrine solution to the silane solution is 1: 2-3.
The crosslinking agent is at least one of alkyl peroxide, aryl peroxide, acyl peroxide and ketone peroxide.
The crosslinking assistant is at least one of poly-1, 2-butadiene, triallyl cyanate and triallyl isocyanate.
The stabilizer is composed of methyl tin mercaptide and a calcium/zinc composite stabilizer according to a mass ratio of 2-5: 1.
The antioxidant is at least one of antioxidant 1076, antioxidant 2246 and antioxidant DSTP.
The lubricant is a compound of polyethylene wax and a fluoroelastomer, wherein the mass ratio of the polyethylene wax to the fluoroelastomer is (2-4): 1.
a preparation method of a crosslinked polyethylene insulated cable material comprises the following steps:
(1) adding the modified polyethylene, the crosslinking agent, the crosslinking assistant and the stabilizer into a smelting machine according to the amount, uniformly mixing, and then carrying out melt blending at 120-180 ℃ to obtain a polyethylene crosslinking precursor;
(2) adding the polyethylene crosslinking precursor, the nano modified organic silicon microspheres, the antioxidant and the lubricant into an internal mixer, and mixing at 130-150 ℃ to obtain a polyethylene crosslinking treatment product;
(3) and carrying out compression molding on the polyethylene cross-linked treatment product to obtain the cross-linked polyethylene insulated cable material.
Example 3
A crosslinked polyethylene insulated cable material comprises the following components in parts by weight:
100 parts of modified polyethylene, 10 parts of nano modified organic silicon microspheres, 2 parts of cross-linking agent, 1 part of cross-linking assistant, 1 part of stabilizer, 0.5 part of antioxidant and 1 part of lubricant.
The modified polyethylene is obtained by modifying polyethylene by using a modifying treatment agent.
The preparation method of the modified treating agent comprises the following steps:
s1, weighing rhenium trichloride, adding the rhenium trichloride into deionized water, and stirring until the rhenium trichloride is completely dissolved to obtain a rhenium trichloride solution; weighing pectin, adding the pectin into deionized water, stirring until the pectin is completely dissolved, adding phytic acid, and stirring again until the phytic acid is dissolved to obtain a precursor mixed solution;
wherein in the rhenium trichloride solution, the mass ratio of rhenium trichloride to deionized water is 1: 5-10; in the precursor mixed solution, the mass ratio of pectin to phytic acid to deionized water is 1: 2-3: 10-15;
s2, heating the precursor mixed solution to 70-80 ℃, dropwise adding the rhenium trichloride solution while stirring, continuing to react for 2-4 h after dropwise adding is finished, then pouring into a reaction kettle, heating to 200-240 ℃, sealing to react for 4-6 h, naturally cooling to room temperature, filtering to obtain a solid, washing with hot water at 60-80 ℃ for three times, then washing with dichloromethane for three times, and drying under reduced pressure to obtain a modified substance precursor;
the volume ratio of the rhenium trichloride solution to the precursor mixed solution is 1: 2-5;
s3, placing the modified precursor in a graphite furnace, taking inert gas as protective gas, heating to 500-550 ℃, carbonizing, naturally cooling to room temperature, and crushing to obtain the modified treating agent.
The preparation method of the modified polyethylene comprises the following steps:
s1, weighing polyethylene, calcium ricinoleate, epoxidized soybean oil and vinyl tributyrinoxime silane, adding the weighed materials into an open mill, heating to 180-220 ℃, and stirring for reaction for 0.5-1 h to obtain a polyethylene pretreatment substance;
wherein the mass ratio of the polyethylene to the calcium ricinoleate to the epoxidized soybean oil to the vinyl tributyrinoxime silane is 100: 2-3: 3-5: 0.5-2;
s2, adding the modifying treatment agent into the polyethylene pretreatment, and stirring and reacting at 150-180 ℃ for 1-2 h to obtain a polyethylene modified treatment substance;
wherein the mass ratio of the modifying treatment agent to the polyethylene pretreatment is 1: 20-50;
s3, weighing polyethylene again, adding the polyethylene into the polyethylene modified treatment substance, heating to 180-220 ℃, stirring for reaction for 0.5-1 h, and adding the mixture into an extruder for extrusion granulation to obtain modified polyethylene;
wherein the mass ratio of the polyethylene to the polyethylene modified treatment substance is 1: 3-8.
The preparation method of the nano modified organic silicon microsphere comprises the following steps:
s1, weighing tetraethoxysilane, adding the tetraethoxysilane into n-butyl alcohol, stirring uniformly, then sequentially adding triglyceride, tween-80 and sodium dodecyl benzene sulfonate, stirring uniformly again, placing in a water bath at 60-80 ℃, and continuously stirring for 0.2-0.5 h to obtain a silane solution;
wherein the mass ratio of tetraethoxysilane, triglyceride, tween-80, sodium dodecyl benzene sulfonate and n-butyl alcohol is 1: 0.1-0.2: 0.05-0.2: 0.1-0.3: 5-10;
s2, weighing oxymatrine, adding the oxymatrine into deionized water, heating the water bath to 60-80 ℃, and stirring for 0.5-1 h to obtain a oxymatrine solution;
wherein the mass ratio of the hydroxyl matrine to the deionized water is 1: 5-10;
s3, under the condition that the temperature of a water bath is 60-80 ℃, dropwise adding the hydroxylightyellow sophora root aqueous solution into the silane solution, stirring while dropwise adding, pouring the mixture into a reaction kettle after dropwise adding, setting the temperature to be 160-180 ℃, reacting for 8-12 hours, cooling to room temperature, filtering to obtain a solid, washing with deionized water for three times, then washing with ethanol for three times, drying under reduced pressure, and crushing to obtain nano modified organic silicon microspheres;
wherein the volume ratio of the hydroxymatrine solution to the silane solution is 1: 2-3.
The crosslinking agent is at least one of alkyl peroxide, aryl peroxide, acyl peroxide and ketone peroxide.
The crosslinking assistant is at least one of poly-1, 2-butadiene, triallyl cyanate and triallyl isocyanate.
The stabilizer is composed of methyl tin mercaptide and a calcium/zinc composite stabilizer according to a mass ratio of 2-5: 1.
The antioxidant is at least one of antioxidant 1076, antioxidant 2246 and antioxidant DSTP.
The lubricant is a compound of polyethylene wax and a fluoroelastomer, wherein the mass ratio of the polyethylene wax to the fluoroelastomer is (2-4): 1.
a preparation method of a crosslinked polyethylene insulated cable material comprises the following steps:
(1) adding the modified polyethylene, the crosslinking agent, the crosslinking assistant and the stabilizer into a smelting machine according to the amount, uniformly mixing, and then carrying out melt blending at 120-180 ℃ to obtain a polyethylene crosslinking precursor;
(2) adding the polyethylene crosslinking precursor, the nano modified organic silicon microspheres, the antioxidant and the lubricant into an internal mixer, and mixing at 130-150 ℃ to obtain a polyethylene crosslinking treatment product;
(3) and carrying out compression molding on the polyethylene cross-linked treatment product to obtain the cross-linked polyethylene insulated cable material.
Comparative example
A crosslinked polyethylene insulated cable material comprises the following components in parts by weight:
90 parts of polyethylene, 1 part of cross-linking agent, 0.5 part of cross-linking assistant, 0.5 part of stabilizer, 0.3 part of antioxidant and 0.8 part of lubricant.
The crosslinking agent is at least one of alkyl peroxide, aryl peroxide, acyl peroxide and ketone peroxide.
The crosslinking assistant is at least one of poly-1, 2-butadiene, triallyl cyanate and triallyl isocyanate.
The stabilizer is composed of methyl tin mercaptide and a calcium/zinc composite stabilizer according to a mass ratio of 2-5: 1.
The antioxidant is at least one of antioxidant 1076, antioxidant 2246 and antioxidant DSTP.
The lubricant is a compound of polyethylene wax and a fluoroelastomer, wherein the mass ratio of the polyethylene wax to the fluoroelastomer is (2-4): 1.
a preparation method of a crosslinked polyethylene insulated cable material comprises the following steps:
(1) adding polyethylene, a cross-linking agent, a cross-linking auxiliary agent and a stabilizing agent into a smelting machine according to the amount, uniformly mixing, and then carrying out melt blending at 120-180 ℃ to obtain a polyethylene cross-linking precursor;
(2) adding the polyethylene crosslinking precursor, the antioxidant and the lubricant into an internal mixer, and mixing at 130-150 ℃ to obtain a polyethylene crosslinking treatment product;
(3) and carrying out compression molding on the polyethylene cross-linked treatment product to obtain the cross-linked polyethylene insulated cable material.
The invention has the beneficial effects that:
1. the invention provides a crosslinked polyethylene insulated cable material and a preparation method thereof, wherein modified polyethylene is obtained by modifying polyethylene, so that the high temperature resistance and the crosslinkability of the polyethylene are improved, the water permeability of the polyethylene is reduced by adding nano modified organic silicon microspheres, and the obtained crosslinked polyethylene cable material has excellent mechanical properties, high temperature resistance, low water resistance and excellent crosslinkability, and the application range of the crosslinked polyethylene cable material is effectively expanded.
2. According to the invention, rhenium salt is used for reacting with pectin and phytic acid, then a complex reaction is carried out, and finally high-temperature carbonization is carried out to obtain the modified treating agent. Pectin and phytic acid can be used as carbon sources for later carbonization, pectin and phytic acid are selected as carbon sources, the pectin and the phytic acid are widely present in plants, the pectin and the phytic acid can be conveniently obtained and have no pollution, the phytic acid can be combined with rhenium ions to form a precipitation complex, the pectin is stable, and gel which is convenient to filter can be generated during reaction; in addition, the phytic acid contains phosphorus atoms, and phosphorus is retained in carbide in the later carbonization process, so that certain flame retardance can be achieved. The finally obtained carbide modifier containing rhenium ions can modify polyethylene, so that the high temperature resistance of the polyethylene is improved, and the crosslinkability of the polyethylene is also improved.
3. And (3) treating the polyethylene with calcium ricinoleate, epoxidized soybean oil and vinyl tributyrinoxime silane to obtain a polyethylene pretreatment substance. Wherein, calcium ricinoleate and epoxidized soybean oil are used as chelating agent and stabilizing agent of polyethylene, which can make the combination of polyethylene and other substances more compact, and vinyl tributyrinoxime silane is used as silane cross-linking agent, which can enhance the cross-linking ability of polyethylene molecular chain. And then the added modifying treatment agent and the polyethylene pretreatment are subjected to crosslinking, melting and mixing, and the polyethylene is modified, so that the high-temperature resistance of the polyethylene can be improved. Polyethylene is added again, because the modified polyethylene has excellent compatibility with polyethylene, the polyethylene can be endowed with excellent tensile property, impact property and bending property; and simultaneously, the crosslinking performance of the polyethylene can be improved.
4. The invention prepares and adds nano modified organic silicon microspheres, aiming at reducing the water permeability of polyethylene. Although the crosslinked polyethylene has excellent low temperature resistance, chemical resistance and electrical insulation, the water vapor permeability of the crosslinked polyethylene is not improved, and when the water content is high, water vapor can permeate the polyethylene to enter the polyethylene to cause the insulation to lose. Therefore, the water permeability of polyethylene is improved by preparing the nano modified organic silicon microspheres. The preparation method of the nano modified organic silicon microspheres comprises the steps of firstly, carrying out hydrolysis reaction on tetraethoxysilane under the action of an organic solvent, a surface agent and a dispersing agent to obtain an oil phase containing silicon oxide, then, dropwise adding a water phase containing oxymatrine into the oil phase to form water-in-oil, wherein the oxymatrine can participate in the reaction of the silicon oxide, and functional groups on the surface of the oxymatrine can be grafted in the silicon oxide to finally obtain the silicon microspheres containing the oxymatrine, namely the nano modified organic silicon microspheres. The nano modified organic silicon microspheres are added into a cross-linked polyethylene material as an additive and can be combined with polyethylene, so that pores formed among crystal bundles or crystal grains in a polyethylene structure are reduced, water molecules are difficult to pass through, and the water permeability of the polyethylene is greatly reduced.
In order to illustrate the present invention more clearly, the performance of the crosslinked polyethylene cable materials prepared in examples 1 to 3 of the present invention and the comparative example was tested, and the results are shown in table 1:
TABLE 1 Properties of crosslinked polyethylene Cable materials
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The crosslinked polyethylene insulated cable material is characterized by comprising the following components in parts by weight:
80-100 parts of modified polyethylene, 5-10 parts of nano modified organic silicon microspheres, 0.5-2 parts of cross-linking agent, 0.05-1 part of cross-linking assistant, 0.1-1 part of stabilizer, 0.2-0.5 part of antioxidant and 0.5-1 part of lubricant.
2. The material for the crosslinked polyethylene insulated cable according to claim 1, wherein the modified polyethylene is obtained by modifying polyethylene with a modifying treatment agent;
the preparation method of the modified treating agent comprises the following steps:
s1, weighing rhenium trichloride, adding the rhenium trichloride into deionized water, and stirring until the rhenium trichloride is completely dissolved to obtain a rhenium trichloride solution; weighing pectin, adding the pectin into deionized water, stirring until the pectin is completely dissolved, adding phytic acid, and stirring again until the phytic acid is dissolved to obtain a precursor mixed solution;
wherein in the rhenium trichloride solution, the mass ratio of rhenium trichloride to deionized water is 1: 5-10; in the precursor mixed solution, the mass ratio of pectin to phytic acid to deionized water is 1: 2-3: 10-15;
s2, heating the precursor mixed solution to 70-80 ℃, dropwise adding the rhenium trichloride solution while stirring, continuing to react for 2-4 h after dropwise adding is finished, then pouring into a reaction kettle, heating to 200-240 ℃, sealing to react for 4-6 h, naturally cooling to room temperature, filtering to obtain a solid, washing with hot water at 60-80 ℃ for three times, then washing with dichloromethane for three times, and drying under reduced pressure to obtain a modified substance precursor;
the volume ratio of the rhenium trichloride solution to the precursor mixed solution is 1: 2-5;
s3, placing the modified precursor in a graphite furnace, taking inert gas as protective gas, heating to 500-550 ℃, carbonizing, naturally cooling to room temperature, and crushing to obtain the modified treating agent.
3. The crosslinked polyethylene insulated cable material according to claim 1, wherein the preparation method of the modified polyethylene comprises:
s1, weighing polyethylene, calcium ricinoleate, epoxidized soybean oil and vinyl tributyrinoxime silane, adding the weighed materials into an open mill, heating to 180-220 ℃, and stirring for reaction for 0.5-1 h to obtain a polyethylene pretreatment substance;
wherein the mass ratio of the polyethylene to the calcium ricinoleate to the epoxidized soybean oil to the vinyl tributyrinoxime silane is 100: 2-3: 3-5: 0.5-2;
s2, adding the modifying treatment agent into the polyethylene pretreatment, and stirring and reacting at 150-180 ℃ for 1-2 h to obtain a polyethylene modified treatment substance;
wherein the mass ratio of the modifying treatment agent to the polyethylene pretreatment is 1: 20-50;
s3, weighing polyethylene again, adding the polyethylene into the polyethylene modified treatment substance, heating to 180-220 ℃, stirring for reaction for 0.5-1 h, and adding the mixture into an extruder for extrusion granulation to obtain modified polyethylene;
wherein the mass ratio of the polyethylene to the polyethylene modified treatment substance is 1: 3-8.
4. The crosslinked polyethylene insulated cable material according to claim 1, wherein the preparation method of the nano-modified organosilicon microspheres comprises:
s1, weighing tetraethoxysilane, adding the tetraethoxysilane into n-butyl alcohol, stirring uniformly, then sequentially adding triglyceride, tween-80 and sodium dodecyl benzene sulfonate, stirring uniformly again, placing in a water bath at 60-80 ℃, and continuously stirring for 0.2-0.5 h to obtain a silane solution;
wherein the mass ratio of tetraethoxysilane, triglyceride, tween-80, sodium dodecyl benzene sulfonate and n-butyl alcohol is 1: 0.1-0.2: 0.05-0.2: 0.1-0.3: 5-10;
s2, weighing oxymatrine, adding the oxymatrine into deionized water, heating the water bath to 60-80 ℃, and stirring for 0.5-1 h to obtain a oxymatrine solution;
wherein the mass ratio of the hydroxyl matrine to the deionized water is 1: 5-10;
s3, under the condition that the temperature of a water bath is 60-80 ℃, dropwise adding the hydroxylightyellow sophora root aqueous solution into the silane solution, stirring while dropwise adding, pouring the mixture into a reaction kettle after dropwise adding, setting the temperature to be 160-180 ℃, reacting for 8-12 hours, cooling to room temperature, filtering to obtain a solid, washing with deionized water for three times, then washing with ethanol for three times, drying under reduced pressure, and crushing to obtain nano modified organic silicon microspheres;
wherein the volume ratio of the hydroxymatrine solution to the silane solution is 1: 2-3.
5. The crosslinked polyethylene insulated cable material according to claim 1, wherein the crosslinking agent is at least one of alkyl peroxide, aryl peroxide, acyl peroxide and ketone peroxide.
6. The crosslinked polyethylene insulated cable material according to claim 1, wherein the crosslinking assistant is at least one of poly-1, 2-butadiene, triallyl cyanate and triallyl isocyanate.
7. The crosslinked polyethylene insulated cable material according to claim 1, wherein the stabilizer is a composite stabilizer of methyl tin mercaptide and calcium/zinc in a mass ratio of 2-5: 1.
8. The crosslinked polyethylene insulated cable material according to claim 1, wherein the antioxidant is at least one of antioxidant 1076, antioxidant 2246, antioxidant DSTP.
9. The crosslinked polyethylene insulated cable material according to claim 1, wherein the lubricant is a compound of polyethylene wax and a fluoroelastomer, wherein the mass ratio of the polyethylene wax to the fluoroelastomer is 2-4: 1.
10. a method for preparing a crosslinked polyethylene insulated cable material according to any one of claims 1 to 9, comprising the steps of:
(1) adding the modified polyethylene, the crosslinking agent, the crosslinking assistant and the stabilizer into a smelting machine according to the amount, uniformly mixing, and then carrying out melt blending at 120-180 ℃ to obtain a polyethylene crosslinking precursor;
(2) adding the polyethylene crosslinking precursor, the nano modified organic silicon microspheres, the antioxidant and the lubricant into an internal mixer, and mixing at 130-150 ℃ to obtain a polyethylene crosslinking treatment product;
(3) and carrying out compression molding on the polyethylene cross-linked treatment product to obtain the cross-linked polyethylene insulated cable material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010616928.8A CN111704761A (en) | 2020-06-30 | 2020-06-30 | Crosslinked polyethylene insulated cable material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010616928.8A CN111704761A (en) | 2020-06-30 | 2020-06-30 | Crosslinked polyethylene insulated cable material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111704761A true CN111704761A (en) | 2020-09-25 |
Family
ID=72544044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010616928.8A Pending CN111704761A (en) | 2020-06-30 | 2020-06-30 | Crosslinked polyethylene insulated cable material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111704761A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112693141A (en) * | 2020-12-10 | 2021-04-23 | 界首市鑫豪塑胶有限公司 | Process for preparing high-performance floor film by using polyethylene graft copolymer |
| CN112820449A (en) * | 2020-12-29 | 2021-05-18 | 贵州新曙光电缆有限公司 | Crosslinked polyethylene insulation halogen-free low-smoke flame-retardant rat and termite-proof medium-voltage power cable |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107112089A (en) * | 2015-08-10 | 2017-08-29 | 住友电气工业株式会社 | The manufacture method of direct current cables, composition and direct current cables |
-
2020
- 2020-06-30 CN CN202010616928.8A patent/CN111704761A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107112089A (en) * | 2015-08-10 | 2017-08-29 | 住友电气工业株式会社 | The manufacture method of direct current cables, composition and direct current cables |
Non-Patent Citations (2)
| Title |
|---|
| 资源化视角的污染控制理论与实践（第1版）: "《资源化视角的污染控制理论与实践（第1版）》", 31 December 2019 * |
| 闫毅主编: "《高分子材料合成创新实验（第1版）》", 31 March 2019, 西北工业大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112693141A (en) * | 2020-12-10 | 2021-04-23 | 界首市鑫豪塑胶有限公司 | Process for preparing high-performance floor film by using polyethylene graft copolymer |
| CN112820449A (en) * | 2020-12-29 | 2021-05-18 | 贵州新曙光电缆有限公司 | Crosslinked polyethylene insulation halogen-free low-smoke flame-retardant rat and termite-proof medium-voltage power cable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107022142A (en) | A kind of DOPO derivatives grafts siloxanes flame retarding reaction type cable material and preparation method thereof | |
| CN111704761A (en) | Crosslinked polyethylene insulated cable material and preparation method thereof | |
| CN116694072B (en) | High-flame-retardance nylon composite material and preparation method thereof | |
| CN102775754A (en) | Halogen-free composite flame retardant poly carbonates (PC)/acrylonitrile butadiene styrene copolymers (ABS) alloy and preparation method thereof | |
| CN114605746A (en) | Master batch for flame retardant material and preparation method thereof | |
| CN109942890B (en) | Graphene-based antistatic agent with smoke suppression function and preparation method thereof | |
| CN108129825B (en) | high-CTI high-heat-resistance halogen-free flame-retardant PC/ABS composition and preparation method thereof | |
| CN111117136B (en) | Cable material | |
| CN117050438A (en) | Flame-retardant PVC composite material and preparation method thereof | |
| CN102911418B (en) | Method for preparing polyacrylate-organic P fire retardant through concentrated emulsion | |
| CN113416358A (en) | Insulating B1-grade flame-retardant power cable | |
| CN107805391A (en) | A kind of silicon rubber fire retardant module and preparation method thereof | |
| CN109897357B (en) | High-stability halogen-free environment-friendly flame retardant for plastics and preparation method thereof | |
| CN114015223A (en) | PC/PBT alloy material and preparation method and application thereof | |
| CN111875968A (en) | Flame-retardant silicone rubber for low-pressure sealing and preparation method thereof | |
| CN111073298A (en) | Flame-retardant plugging agent for substation and preparation method and use method thereof | |
| CN111675873A (en) | Flame-retardant data connecting wire and preparation method thereof | |
| CN116144095B (en) | Crosslinked polyethylene halogen-free flame-retardant cable and preparation method thereof | |
| CN117004111B (en) | Halogen-free flame-retardant cable material for aluminum alloy cable and preparation method thereof | |
| CN116285058B (en) | Network sheath material for burning crust | |
| CN114773707B (en) | Beta-cyclodextrin microcapsule ammonium polyphosphate intumescent flame-retardant low-density polyethylene and preparation method thereof | |
| CN117777615B (en) | High-temperature-resistant flame-retardant PVC material and preparation method thereof | |
| CN105131502A (en) | Preparation method of insulating material for torsion-resistant low-smoke halogen-free oil-proof flame-retardant cable | |
| CN115612221B (en) | Polystyrene composite plastic and preparation method thereof | |
| CN116332983B (en) | Modified cyclic siloxane flame retardant, transparent flame retardant polycarbonate composition and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200925 |
|
| RJ01 | Rejection of invention patent application after publication |